Example usage for org.apache.commons.math3.linear SparseRealMatrix getRowDimension

Introduction

In this page you can find the example usage for org.apache.commons.math3.linear SparseRealMatrix getRowDimension.

Prototype

int getRowDimension();

Source Link

Document

Returns the number of rows in the matrix.

Usage

From source file:edu.byu.nlp.util.asserts.MoreAsserts.java

public static void assertSparseMatricesEqual(final SparseRealMatrix actual, final SparseRealMatrix expected) {
    Preconditions.checkNotNull(actual);//from   w  w w . j av a 2s. c  om
    Preconditions.checkNotNull(expected);
    Preconditions.checkArgument(actual.getRowDimension() == expected.getRowDimension());

    // check densely--this doesn't need to be fast
    for (int r = 0; r < actual.getRowDimension(); r++) {
        for (int c = 0; c < actual.getColumnDimension(); c++) {
            double act = actual.getEntry(r, c);
            double exp = expected.getEntry(r, c);
            if (act != exp) {
                System.err.println("actual[" + r + "][" + c + "]=" + act + " does not match expected[" + r
                        + "][" + c + "]=" + exp);
            }
            Assertions.assertThat(act).isEqualTo(exp);
        }
    }
}

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From source file:simrankapp.util.ReaderWriterUtil.java

public static void writeSimRankInDB(SparseRealMatrix simRankMatrix) {
    Connection con = null;/*w  w w .  j a v a  2 s.com*/
    PreparedStatement stmt = null;
    try {
        Class.forName(TheCrawlersConstants.JDBC_DRIVER);
        System.out.println("Connecting to a selected database...");
        con = DriverManager.getConnection(TheCrawlersConstants.DB_URL, TheCrawlersConstants.DB_USERNAME,
                TheCrawlersConstants.DB_PASSWORD);
        System.out.println("Connected database successfully...");
        stmt = con.prepareStatement(TheCrawlersConstants.INSERT_SIMRANK_SQL);
        int numNodes = simRankMatrix.getRowDimension();
        for (int row = 0; row < numNodes; row++) {
            for (int col = 0; col < numNodes; col++) {
                double value = simRankMatrix.getEntry(row, col);
                if (value > 0) {
                    stmt.setInt(1, row);
                    stmt.setInt(2, col);
                    stmt.setDouble(3, value);
                    stmt.addBatch();
                }
            }
        }
        stmt.executeBatch();

    } catch (Exception e) {
        e.printStackTrace();
    } finally {
        try {
            stmt.close();
            con.close();
        } catch (Exception e) {
        }
    }
}

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From source file:simrankapp.util.ReaderWriterUtil.java

public static void writeSimRankToFile(SparseRealMatrix simRankMatrix, String simRankPath) {
    int numNodes = simRankMatrix.getRowDimension();
    try {//from   w  w  w.j av a 2s.  c o m
        BufferedWriter bw = new BufferedWriter(new FileWriter(new File(simRankPath)));
        // row == col is always 1
        // row > col is symmetric and is equal to row < col
        for (int col = 0; col < numNodes; col++) {
            for (int row = 0; row < numNodes; row++) {
                double value = simRankMatrix.getEntry(row, col);
                bw.write(row + " " + col + " " + value);
                bw.newLine();
            }
        }
        bw.close();
    } catch (Exception ex) {
        ex.printStackTrace();
    }
}

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From source file:simrankapp.util.ReaderWriterUtil.java

public static void writeSparseMatrix(SparseRealMatrix matrix, String Path) {
    int numNodes = matrix.getRowDimension();
    try {/* w  w  w.ja  va  2  s. c o  m*/
        BufferedWriter bw = new BufferedWriter(new FileWriter(new File(Path)));
        // row == col is always 1
        // row > col is symmetric and is equal to row < col
        for (int col = 0; col < numNodes; col++)
            for (int row = 0; row < numNodes; row++) {
                double value = matrix.getEntry(row, col);
                bw.write(row + " " + col + " " + value);
                bw.newLine();
            }
        bw.close();
    } catch (Exception ex) {
        ex.printStackTrace();
    }
}

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